Sheet-metal folder



('No Model.)

' F. A. JUERGENS. 1 SHEET METAL EOLEEE.'

No. 421,722. A EatentediEeb. 18, 18901 UNITEDv STATES PATENT( OFFICE.

FREDERICK A. JUERGENS, OF BUFFALO, NEIV YORK, ASSIGNOR THE NIAGARASTAMPING AND TOOL COMPANY, OF` SAME PLACE.

SHEET-METAL FOLDER.

SPECIFICATION forming part of Letters Patent No. 421,722, dated February18, 189,0.

Application iled December 19, 1889. Serial No. 334,254. (No modell) .Toall whom it may concern):

Be it known that I, FREDERICK A. .TUER GENS, a citizen of the UnitedStates, residing at Buffalo, in the county of Erie and State of NewYork, have invented new and useful Improvements in Sheet-Metal Folders,of which the following is a specification.

This invention relates to the mechanism by which the gages ofsheet-metal folders are adjusted, and has the object to produce anadjusting mechanism by which the position of the gage can be nicelyregulated, and by which the gage can be securely held inposition whenadjusted. f

In the accompanying drawings, Figure l is a top plan View of asheet-metal folder containing my improvements, part of the device beingbroken away to expose the adjusting mechanism. Fig. 2 is a cross-sectionin line Fig. l, on an enlarged scale. Fig. 3 is a front elevation of theadjusting mechanism,

Fig. 4. is a cross-section in Fig. 5

partly in section. line y y, Fig. 3, on an enlarged scale. is a top plan0f the gage-indicator.

Like letters of reference refer to like parts in the several figures.

A represents the stationary main frame of the folder, B the pivotedfolder-bar, C the wing attached to the folderbar, D the clampin g-bararranged between the main frame and the folder-bar, and E thefolding-blade` secured to the top of the main frame, all of any ordinaryor suitable construction.

F represents the gage arranged in the top portion of the main frameunderneath the foldiiigblade, and G a horizontal slide attached to thefront side of the gage. This slide has the form of an open frame and isarranged in ways g g', formed inl a forward extension H of the mainframe. The way g is formed in the extension H, and t-he way g by anAadjustable gib, whereby the wear of the parts can be taken up.

I represents a vertical rotary post journaled with its lower end in abracket t', formed on the front side of the main frame and provided atits upper end with a crank J, which is connected with the slide G by alink j, so that vlocked against turning.

the slide is moved back and forth by turning the post I in one or theother direction.

K represents a worm-wheel formed on the post I, and L is a worm whichengages with `said wheel and is formed on a horizontal shaft l. Thelatter is journaled in bearings fm m m2, formed on a frame M, which issecured to the under side of the .cXtensionH of the main frame in frontAof the worm-wheel. The bearings m m m2 are half-bearings, which openinwardly, as represented in Fi'g. 4, so that the shaft can be insertedinto these bearings and be retained therein by the contact of the wormwith the worm-wheel. The frame M is attached to the frame-extension l-Iby screws n, passing through slots n which perlnit the frame to be movedtoward and from the worm-wheel, and whereby the wear of the parts can betak-en up. rFhe frame is adj usted by a set-screw o, passing through adepending lug on the frame-extension andbearingagainst the front side ofthe frame M. The portion p of the shaftZ which projects beyond thebearing m2 is screw-threaded and provided with a jam-nut P, by which theshaft can be the shaft is provided with a thumb-piece q.

R represents the cover, which extends over the slide G and is secured tothe frame-extension II on both sides of the slide'. The post I extendsthrough this cover and is provided on the upper side thereof with anindeX-iinger r, which moves in a recess s, formed in the cover, andindicates the position of the gage on a graduated segment t.

Upon releasing the j am-nutl? the gage can be nicely adjusted by turningthe worm-shafty l. The adjustment of ,the gage. is greatly facilitatedby the indicator r. The parts of the adjusting device` are so arrangedthat they do not project forwardly from the folder, but are out of theway of the operator, and consequently not liable to be accidentallymoved or displaced. The worm and worm- Vwheel will hold the gagesecurely in position under ordinary circumstances; but, if 'pre-'ferred, the shaft of the worm-wheel may be securely locked by thejamnut.

The outer end of I claim as my inventionl. The combination, with themain frame and the gage and slide, ot' a rotary post provided with acrank connected with the slidea a Worm-Wheel attached to Said post, anda Worm meshing with Said Worm-wheel, Suhstantally as set forth.

2. The combination, with the main frame and the gage and slide, of arotary post provided with a era-nk connected with the slide, aWorm-wheel attached to said post, a horizontal actuating-shaft providedwith a Worm and having' a screw-threaded portion, and a jam-nut appliedt0 said screw-threaded portion, substantially as Set forth.

3. The Combination, with the main frame and the gage and slide, of arotary pest provided with a crank eonneeted with the Slide, aWor1n-wl1eel attached to said post, a Worm and aetuatingg-sha'ft, and aframe in which the Worm-shaft is mounted and which is made ad justahletoward and Vfrom the worm-wheel,`

